HGV medical

My medical expires 08/08/2018 and I have just got the D47P form through the post this morning

I am not intending to renew the D4 medical and my photo has 5 years to go

On the D47P form it says that the photo can be updated for FREE but does that mean for the remaining 5 years of the current photo or is that for the next 10 years :question: